Tool support for lathes



Il ll Il Il H Il I[ H Il ll ll Il Il ll 1L E. J. SVENSON TOOL SUPPORT FOR LATHESv Filed MaICh 28, 1929 Nov. 4, 1930.

nu 1| u Il ...rmmvmmm h i along the y'Patented Nov. 4, 17930 UNITED g fsrATEs PATENT )oFFiCE y ERNEST J. SVENSON, onnooxroian,ILLINOIELy AsSIerNOR` To SNDSIRAND MACHINE f 'rOoL co., OF ROOKEORD, ILLINOIS, n` CORPORATION or ILLINOIS TOOL ySUPPORTI ron Lnfrnns Application nea March as, 1929. ser'ia'iNo. safrzr.` f f yThe invention relates generally'to lathes j feed mechanism of the lathe.

15 Another object is to provide such an attachment having means for varying the angle o-f travel of the auxiliary tool with respect to the axis of the work so that angular facing cuts may be vmade therewith. j

20l Other objects and advantages will become vapparent from the following description v taken Vinl connection with the accompanying drawings, in which: i

Figure'l isa fragmental rear elevational 25 view partially in section, of a lathe embodying the preferred form o-f the'invention. s

' Fig; 2 is an end elevational view of the headstock shown in Fig. 1 as viewed fromthe left in Fig. 1. l f v Fig. Bis a fragmental sectional view-taken line 3-'3 in Fig.A 1 looking inthe ydirection ofthe arrows. Vhile the invention is jsusceptibleof various modifications and alternative constructions, I have-shown inthe drawings and have ,hereindescribed in detailthe preferred embodiment,- butit is tobe understood that I do not thereby intend to limitthe `invention to the specific form disclosed, but intend to cover all modifications `and alternative constructions fa'lling within the spirit andfscope of the invention als-expressed in thefappended 'As illustrated-herein, the invention is em. 45. .bodied in a vlathe-ofv the general type shown in my copending application 4Serial No.' 245,- 168 filed January l7, 1928, and having-a headstoclr'lO and agtailstocl; 11 supported on a suitable bed 12. YAxially alined spindlesl to; w114 'are rotatably mounted in the headsecured by screws21.

stock and tailstock respectively between whichgspindles `a work piece 15 may be supported and rotated for the performance of various 'cutting operations thereon. Front and reartool holders 16 and are suitably mounted in a conventional ,manner (not shown) for movement toward and away from `al work piece supported between the spindles v13 and 14.

The tool holders 16 and 17 may be autri- -matically actuated'toward and away from the work inV timed relation `to each other Yby means of a Suitable feed mechanism (not lherein shown) so as to impart'the'desired "feed and `rapid'traversemovements to the ytool holders. This mechanism may be of the characterv4 shown in said copending application and includes in the presentV instance Ya shaft '18 extendingjout ofthe rear side'of thelathe bed beneath the headstock 10.I Preferably the shaft 18 is operatively connected to the feed mechanism of tne lathe so as-to rotatein forward and reverse-directions as Y the t'o'oljholders 16 and 17 are advanced towards and withdrawn from'the-worl.

lInorder that turning, facing or charnferling operations' maybe performed in addition to those operationsordinarily performed by the standard front and rca'r tools, the invention provides an auxiliary tool* support havinga hollow base 20 secured on thetop of the headstock and comprising a portion which proj ectsovcr the spindles.l The head'- stoclrlO is preferably foririedv witha flat upper surface-19 upon which the base20 is The,*prejecting 'portion of thebase' 2O is provided withA a vertically disposed Vsidesurface 22 on which aswivel blocker base 23 isadjustably'secured.` On the bloclr25 a 'tool lslide 24 is slidably supported by underdove-tail ways icc has clamping screws 28 to engage the tool and an adjusting screw 29 for permitting radial adjustment of the tool. Thus during the movement of the auxiliary tool slide 24 the tool carried thereby is out of the way of the standard front and rear tool holders so that the tools carried by the two standard tool holders and by the auxiliary slide 24 may operate on the work piece at the same t-ime and thus reduce the total time required for the completion of a work piece.

actuated automatically in timed relation to the tool holders 16 and 17 by means carried in part by the support and extending down-V wardly along the rear side of the headstock 10, so as to be out of the way of the operator, and adapted to be connected to the reversely driven shaft 18 of the feed mechanism which drives the two tool holders 16 and 17.

The actuating mechanism for the tool slide 24 preferably includes a rack 30 secured to onek side of the slide by screws 3()a in a position substantially parallel to the ways 25. This rack 30 is engaged by a pinion 31 secured on one end of a shaft 32 which is r otatably mounted in a horizontal position in the projecting portion of the base 20. This shaft extends entirely through the projecting portion of the base and at its other end a pinion 33 is removably secured thereto by a screw 33a. The'pinion 33 is engaged by a rack 34 which is slidably mountedin the base 20 for movement substantially parallel to the axis of the headstock spindle 13.

In the present instance, the rack 34 and the pinion 33 are mounted in the forward side of the base 20 and a cover plate 35 is removably securedon the forward side thereof to enclose the rack and pinion. A similar cover 36 is also provided over the pinion 32 and this cover is secured to the slide 23 .so as to cover the pinion 32 throughout the entire range of movement of the slide. l

The power transmitting connect-ion .between the feed mechanism of the lathe and the rack 34 is formed by means mounted on the base 20 and driven by means extending downwardly along the rear side of the headstock for connection with the lathe mechanism. In-the present instance, vthis vertically extending means comprises a chain 37 engaging at its lower vend a sprocket 38 positioned on the shaft 18 and engaging at its upper end a sprocket 39'secured on the'end of a horizontal shaft 40 rotatably mounted in the base 20. The shaft 40 is positioned in the base 20'so as to extend transversely of the rack 34 and has a beveledY gear 41 thereon engaging a similar beveled gear 42 rotatably mounted in a vertical cross-web 43 formed in the base. The beveled gear 42 is fixed against longitudinal movement and is interiorly threaded to engage a screw 44, one end of which is secured to the rack 34. Thus v -38 and 39. The auxiliary tool slide 24 is preferably when the shaft 18 is rotated in opposite directions the tool slide 24 will be moved toward and away from' the work.

The top of the base 2O is preferably closed by a removable top wall 45 so that access may be had to the various gears contained within the base and a guard 46 is preferably secured to the top wall 41 of the base so as to project downwardly along the side of the headstock 10 to cover the chain 37 and the two sprockets After the. actuating mechanism has been initially connected to the shaft 18 it is often desirable to vary the extent of the inward radial movement of Ythe tool. It is contemplated that this adjustment may be made most advantageously by removing the gear 33 from the shaft 32 to obtain a rough adjustment of the slide y24 and then 'adjusting the tool 26 on the slide 24 so as to obtain an accurate setting of the tool.

In the preferred form of the invention the swivel block 23 is mounted on the base 2O in such a manner that the direction of travel rof the tool slide 24 may be varied. To this end as shown in Fig. ,3, the swivel block is mounted for pivotal movement about the axis of the shaft 32. A plurality'of elongated arcuate slots 47 are formed in the block 23 centered on the 'axis of the shaft 32 and a plurality of bolts48 extend through the .slots and engage the projecting portion of the base 20. Thus the block 23 may be moved about the axis of the shaft 32 and may be secured in any adjusted position by means of the bolts 48. Since the swivel block moves about the axis of the shaft 32, the relation of the rack 30 to the pinion .31 remains unchanged during adjustment of the block so Vthatthe tool slide 24 may be reciprocated in any adjusted position. y

From the foregoing; it will be apparent that the invention provides a tool carrying attachment which may be readily secured in an operative position on a standard lathe so as to augment the tools normally carried by the lathe by performing additional cutting operations during the same operating period, thus making it possible to produce work pieces requiring an exceedingly large number-'of varied cuts without re-chucking the v,arranged so that it may be made exteriorly mounted in said headstoclr, and a reversible feed shaft mounted inand projecting trans- Y versely out of said bed, the combinationl of n a tool carrying attachment comprising a base removably secured on the top offsaid headstock and extending over theworlr supporting end of the spindle, a tool slide reciprocably supported on the projecting portion vof said base for movement radially of the work, means mounted in said base forV moving said tool slide including a transverse shaft vprojecting rearwardly from said base beyond the rear side of the headstoclr, a pair of sprockets, one on each shaft positioned immediately adjacent to the side of the headstock, and an endless chain extending along the side of the headstock and connecting the two sprockets.

2. An auxiliary tool carrying attachment adapted for mount-ing on a lathe, said attachment comprising,4 in combination, a

base adapted to be removably secured lin fixed position on the headstock of such a lathe, a tool slide reciprocably mounted on v said base, means for reciprocating said slide arranged to project beyond the Side of said headstock to facilitate connection with a movf e ing partof such a" lathe, and a guard carried by said baseto cover the moving elements 0f ysuch a connection.

8.' An auxiliary tool carryingV attachment for lathes comprising, in combination, a base adapted to be mountedon a lathe headstock, a. tool slide reciprocably mounted on said base, and means connected to said slide for moving the same and arranged to project beyond the side of a headstock upon which said base is lmounted for connection with a moving said portion, a rack on said slide, a pinion on said shaftrso as to be laccessible on one side of said portion engaging one of said racks, and a pinion on said shaft so as to be accessible on the other side of said portion engaging.

the other of said racks and removable from said shaft to permit radial adjustment of said slide.

5. Ain auxiliary tool support for lathes comprising, incombination, a base adapted to be removably secured on a lathe headstock and projectingfrom said base, a swivel block mounted on said base for adjust-ment about a horizontal axis, a tool slide reciprocably mounted on said block, and means for reciprocating said slide comprising a first shaft rotatably mounted on said axis, a rack on said slide, a pinion on said shaft engaging said rack, va secondV rotatable horizontal shaft mounted in said base adapted for driving connection with the feed shaft of the lathe, and speed reduction gearing mounted in said base and forming adriving connection between said first and second shafts.

In testimony whereof, I have hereunto aflixed my signature. i

' ERNEST J. SVENSON.

y v part of said lathe, said connection including a readily removable gear to'facilitate adjustment of the extent of inward radial movement of said slide relatively to the work.

4. An auxiliary tool carrying attachment for lathes comprising, in combination, a base adapted to beremovably mounted in fixed position on the he'adstock-of alathe and hav- `inga portion .projecting from said base, a tool slidereciprocably mounted on one side of said projecting portion, a rack 'slidably mounted on'the other side 'of said portion, means for f moving said rack, la rotatable shaft mounted in ,and extending'transversely through iisl ` iso 

